Well, Walt is obviously on his way back to get the Ricin from his old house. He wants to kill Uncle Jack and his thugs and he will, somehow. My guess is that he will get Jesse to help him kill them, give the Ricin to Lydia and then Jesse will kill him. Walt dies, Jesse survives.

Well - I do think the companies "Gray Matter" and Madrical - will play a part in the last episode. Maybe Walt will end up getting royalties to his stock in Gray Matter - which will help his family. Madrical - there are still questions about that. Is Madrical really Gray Matter - who knows? Somehow I think Sal will get the job of making sure Walt's family - gets the money, etc. ANd - Jesse, Todd, Lydia - have no clue. But - I think the ricin comes in to play.

Walt and Jessie realize that the limits to the meth business. No operating or financial leverage. Wall Street, is a different matter. Business practices of methi business are easily transferable. Prospect of making REAL money is too good for the two of them to pass up. Wall Street also provides Jessie with opportunity to chill and get a grip. Fewer dead bodies in the rear view mirror. Only ruined lives. So, Walt and Jessie decide to set up an investment bank on Wall Street.

They recruit Jack and his people as "business development" and "customer relationship management" guys.

Jack doesn't know Jack about finance, and agrees use his /Walt's 70 million o launch the firm.

Lydia takes care of wining and dining Jami Dimon and others in NYC. Recruits the Mayflower Madam to set up HR department.

Firm opens into one of the see-thru floors at 140 Broadway. Name on door is Heisinger & Co. Walt and Jessie are silent partners and are never seen.

Core of the operation is Baker Scholars from Harvard Business School. Recruited using signinng bonuses from the $70 million. These guys recruit hackers from Russia to get software needed to run company.

Like other Wall Street firms, the stock in trade of Heisinger is screwing everyone they deal with. Differentiating factor for Heisinger and Co. is "transparency." This means they disclose to everyone exactly how they are screwing them. Jack and his boys make clients understand that it is in their interests to accept offers they cannot refuse.

Typical business relationship is for Jack and his boys bring in clients, most the worse for wear, who get ripped off by the HBS people. Anyone who balks is wasted by Jack and his boys.

Meanwhile, feds cannot pin anything on Skylar. She takes a Greyhound bus and moves back to NYC; becomes CFO and Chief Compliance Officer for Heisinger & Co and puts kid in pre-school prep school for pre schoolers up on upper East Side.

Walt Jr. gets package of money, splits for San Francisco and sets up a members-only head shop for those who see themselves as having been victimized by parents. His shop gets a great rep as the go-to place to place for pity parties, getting depressed and stoned all at the same time. Waiting list for membership stretches out to 13 months. Places in line trade at a premium on eBay.

No one ever sees Walt or Jessie again. No way to communicate with them even via numbered accounts in the Cayman Islands. People mumble things about Jack and Tod, but not out loud. Saul gets into combine driving in Nebraska. One day has an accident and gets combined with corn. Not pretty.

Walt the DEA guy is never found. Things lighten up for drug guys in NM.

Oh, yes. Mari spends years in litigation with the DEA over survivor's benefits from Walt. Lawyers for the DEA go after the base of her claim and demand she have proof that Walt is dead. Broke and out on the street, she finds the magic of meth, becomes a druggie and is ultimately drops off the map as just another disappeared person.

Lydia is not meeting with Walt and letting him slip something into her drink. Lydia would bring Todd & Nazis the 2nd Walt calls besides the fact that meeting with a known and wanted drug kingpin isn't the most stealth way to do business. Maybe the Ricin is for Gretchen & Eliott, but probably Walt has a more creative way to extract his denied contribution from Grey Matter. My guess is he somehow takes the company down AND hurts the two principals in the process. No question the guns are for getting the Nazis and his money barrels - I'd expect Walt to bring some henchman to hire to that gunfight. Biggest questions to me are what does Walt do if/when he finds Jesse alive and what toll do Skylar, Flynn/Walt Jr, Baby Holly and Marie pay for Walt's sins. I think 3/4 of those are collateral damage to Walt's final crime spree and whomever survives might take their own life. I do agree that Walt plans to defeat the Nazis and then probably turn himself in and try to take ALL of the blame for his crimes yet take the Ricin to ensure he only has to confess but not die slowly in prison

Brock and Holly kill Todd. The series will conclude when a Star Trek holodeck program ends and the crew reveals how they wanted to see what culture and life was like in the early 21st century in the United States.